Cut to the next day, when Tracey returns home! Everyone is happy that she's alive. She says that she's feeling weak but (tears tears tears) is glad to be back. She reveals that her health situation (which is still undefined) was actually quite serious, and says that it put things into perspective for her. She puts on her purple shirt and expresses again how thankful she is to be back, noting also that she has a lot of catching up to do. Here's hoping that she doesn't pass out again! Bob has a chat with Tracey, and notes that she can't work out the way others are, per doctors' orders. This means that her nutrition has to be completely in check. And what's the best way to do this? By ingesting some Biggest Loser Protein Powder. They really had me fooled on that product placement! And I can usually smell them a hundred feet away (much like I can smell Jennie-O turkey from 100 feet away!).

Before we know it, we're at the California Health and Longevity Institute. Sami greets the contestants with a special guest in tow -- it's world class chef Curtis Stone! Cuuuuuuute. Rebecca loves him like a pepperoni pizza. Turns out this is Curtis's kitchen boot camp, designed to help the contestants learn more about nutrition. Sami warns them that they'll be quizzed later. If they answer five of her eight questions correctly, they'll get a 15 pound advantage at the weigh-in. Well, that makes their challenge a little more feasible.

Curtis's first lesson has to do with portion size. Turns out you're only supposed to eat three to four ounces of meat per serving. And then we learn a whole bunch of other things that we already knew. Food scales are handy for purposes of measuring. You can also bake, poach, meat, grill and broil all sorts of things instead of using oil. Caesar salad is bad for you, and you should eat a hamburger instead. You can replace 50% of your pasta with a vegetable such as zucchini. Soda makes you fat. Sean is apparently the poster boy for soda, and says that his waterbed is filled with it. His wig is made of Dr. Pepper! Soda kills you. Snacks with protein are the best snacks of all. The lessons continue as the contestants glaze over and Curtis takes on the vocal stylings of Charlie Brown's teacher. It's too much information for them, and their retention appears to be poor. Perfect time for Sami's quiz!